After the walled garden coming to the desktop operating system world, we're currently witnessing another potential nail in the coffin of the relatively open world of desktop and laptop computing. Microsoft has revealed [.pptx] that as part of its Windows 8 logo program, OEMs must implement UEFI secure boot. This could potentially complicate the installation of other operating systems, like Windows 7, XP, and Linux.

Actually it is possible to include something in an open source project, but you'll have to also modify the compiler and probably wait a few years to:

Thompson's paper described a modified version of the Unix C compiler that would:

Put an invisible backdoor in the Unix login command when it noticed that the login program was being compiled, and as a twist
Also add this feature undetectably to future compiler versions upon their compilation as well.